gen-assembly SKILL.md skillA
gen-assembly from partcad/partcad is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add partcad/partcad/gen-assembly@git:20261106.8c298cbPins git:20261106.8c298cb in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- partcad/partcad
- Path
ai-agents/common/skills/gen-assembly/SKILL.md- Versions recorded
- 18
- Latest version
- git:20261106.8c298cb, committed Nov 6, 2026
- First version recorded
- Jul 28, 2026
- Size
- 40,156 bytes
- Repository stars
- 528
- License
- Apache-2.0
Generate a PartCAD assembly (an ASSY that composes parts with placement and/or mates) from a description, writing down what it is required to be, generating or reusing the component parts, settling the placements on temporary layout sketches that /pc:gen-sketch measures and validates, and validating the result with the PartCAD CLI - including measuring the placements again on the assembly's own projections. Use for /pc:gen-assembly or when the user asks to generate or create an assembly…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# pc:gen-assembly Generate a PartCAD **assembly**: an `.assy` file that composes parts (and sub-assemblies) into one product. The text after the command (`$ARGUMENTS`) is the assembly description. *You* author both the ASSY and its component parts and prove the whole thing **passes `pc test`**. There is no legacy `ai` assembly pipeline — this capability is new. ## 1. Decompose `$ARGUMENTS` is the description. Break it into components and the spatial/mechanical relationships between them: which parts, how many of each, and how they attach to or move relative to one another. Clarify only load-bearing ambiguities. Where nothing was put together — objects standing where they stand, a room, a workcell, a world — the request is a scene, not an assembly: follow `/pc:gen-scene` instead. Where the components go is a set of dimensions as much as a part's size is: the gap between two parts, the pitch of a row of them, how high a shelf sits, how far a bracket stands in from an edge. Note every one the description or a reference gives; §3 settles them on sketches before any of them becomes a `location:`. Keep apart what the *product* is required to be — what it does, what it mounts …
Read the whole file at its exact version.
How to install
mdr add partcad/partcad/gen-assembly@sha256:e25bddc836bc17d6The line at the top of this page pins the label git:20261106.8c298cb, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_vygybzksgwmaw4bo)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 18 versions of this file, between Jul 28, 2026 and Nov 6, 2026, about one every 6 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261106.8c298cb latest | 2026-11-06 | 8c298cb | 40,156 B | A | view · diff |
| git:20261102.ef2be30 | 2026-11-02 | ef2be30 | 39,943 B | A | view · diff |
| git:20261101.28138ba | 2026-11-01 | 28138ba | 35,047 B | A | view · diff |
| git:20261024.6286b60 | 2026-10-24 | 6286b60 | 33,049 B | A | view · diff |
| git:20261017.a1c5bc8 | 2026-10-17 | a1c5bc8 | 33,072 B | A | view · diff |
| git:20261017.6e8a7a9 | 2026-10-17 | 6e8a7a9 | 31,264 B | A | view · diff |
| git:20261014.e2a4156 | 2026-10-14 | e2a4156 | 30,908 B | A | view · diff |
| git:20261013.ce7c6cc | 2026-10-13 | ce7c6cc | 30,534 B | A | view · diff |
| git:20261012.f5f039a | 2026-10-12 | f5f039a | 27,796 B | A | view · diff |
| git:20261012.9aa6cf0 | 2026-10-12 | 9aa6cf0 | 27,718 B | A | view · diff |
| git:20261008.9f2d5f9 | 2026-10-08 | 9f2d5f9 | 23,137 B | A | view · diff |
| git:20261008.c42bb65 | 2026-10-08 | c42bb65 | 23,135 B | A | view · diff |
| git:20260922.1e5dabd | 2026-09-22 | 1e5dabd | 22,620 B | A | view · diff |
| git:20260916.fc03fac | 2026-09-16 | fc03fac | 12,446 B | A | view · diff |
| git:20260831.e2f48aa | 2026-08-31 | e2f48aa | 12,432 B | A | view · diff |
| git:20260831.72e90c9 | 2026-08-31 | 72e90c9 | 9,833 B | A | view · diff |
| git:20260822.c21922c | 2026-08-22 | c21922c | 6,686 B | A | view · diff |
| git:20260728.137ff5b | 2026-07-28 | 137ff5b | 3,954 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (40156 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
partcad/partcad · 528 stars · license Apache-2.0 · pushed 2026-11-08 · branch devel
API
GET https://markdownregistry.com/api/v1/artifacts/art_vygybzksgwmaw4bo GET https://markdownregistry.com/api/v1/resolve?ref=partcad/partcad/gen-assembly GET https://markdownregistry.com/api/v1/blob/e25bddc836bc17d66c4c49a75dd9733c4e36830f0482dd9da23eb33b3382252b
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.